Truck extension-ladder.



0, GARY & J. E. MARSHALL TRUCK EXTENSXON LADDER.

APPLICATION TILED JULY 17. 1911.

u. GARY 6; J. E. MARSHALL.

mucx EXTENSION LADDER.

APPLIGATIUN FILED JULY 17,1911. m l 1 @35 5?@ rauented Aug. 18, 1932.

3 SHEETS-SHEET 2 Patented Aug. 13,

s SHEETS-SHEET 3.

W! 5. 5 am UNITED STACK."

CHARLES GARY AND J E, MARSHALL, OF NEW YGIAK, N. Y.

TRUCK TTENSION-LAIEDER Specifizzation of such as will enable others shined in flu; art the t0 which it app'ertains to make and same.

This invention relates to t htdders designed. puriicuinrlv of fire, but. 0f course :ip p'iwbi. uses to which it may be put.

The object 01": the im'cntinn resides pi'mision of {an improi'ed truck gratin indfiei' which C2111 bst- .zmiiy and Q11 V managed, the ladder eiemvnt I sing adapted tube cfimu teii and lQWQITQi ti'u'miagn the instrumvntality uf elactricnii v .i-peramd means.

With the above and other abject in View the im'entiun (.vonsistf; in the details 01" com gtmction and in the mrmng enlent and 80111 binntion 01 parts to be ilfliflitfi! inure fully dvscribcd and 1mrtinn'lm'i'y pointed cut in the u'miendm'l c? figure 1 is a. Sit eiemrioii of a Tusk extension ladder (ZOHFH'HC'LEQ in amordnnve with the invention, certain ,M ing shown in section am the p in which the ladder i'-' mounted in irmumi position, Fig. :1. plan View of W124 siimvn in aide elevatmn of mix: sum-0510011 i 1: tin:

, mated with t lett rs l Patented 251.12g;

@911. Serial 2%. eaasas.

posits ends a truck frame upon the forward end of the truck i is motor 13 of the expiosive type an: i'ect'iy in tiztfii'ikill' of the 11101 01 11 i; mounh an BLZCUiC dynm the motor shaft of the molar 13 Suspended from t- V (m the trucks 10 trains 16 which carrier; 17 connected to .19 namo M. T we prote 'd by latter is mounted 2 and controiiing wime'l 2.. strumentaiity this W1 the svut mmblgd truck 10 and .cuiitrdt the 1 motors 2'1 :ummted 12pm which latter are bran; pel the apparatus. Mm'znted 11pm the truck frame 12 1S :1 turn table comprising firzmtand m'o 'Hii members 22 E 13 reaped? and from thc mm xLc join-nailed in this i has fixed on it; er 52% an 52]" rmspfici mum!) motor mg v \Vile 11.3113? wheei E 27. ii'heire will rotate the Controlled from a mrrent dynamo 14: m lticmntmi on the 1:102:11). shock alvsri rich wiwngear a motor uni 520i:

, 1 J18 SQ their outer end; and corner members 39 and which have their inner ends secured to respective terminals of the segmental rack 33 and which also converge in the direction of their outer ends in a manner similar to the corner membei's'37 and 38. 'lheladder frame further includes a pair of intermediate side members 41 and 42, the former of which has its inner end secured tothe central portion of the segmental rack 34 and its outer end secured to the corner member 38, while the latter has its inner end secured to the central portidn of the segmental rack 33 and its outer end secured to the corner member 40. The corner members 37 an" 38 are connected to the intermediate sid member 41 by means of cross braces43 which constitute laddersteps for use when the frame is raised. Likewise the corner members 39 and 40 are connected to the intermediate side member 4&2 ,by means of cross braces 44 which also constitute ladder steps for use when the ladder frame is raised. Mounted in the ladder frame formed by the corner and side members previously described inwardly of the free end of said frame is a transversely disposed. frame 45 in which are journaled parallel shafts dB and L7. The last named shaft has fixed thereon justinward of the ends of theframe 45 pinions 48 while the shaft 46 is provided at corresponding pointsv with "enlarged cylindrical portions 49; The shaft 47 is extended beyond the ends of the frame 45 and fixed on the extension thereof adjacent the"intermediate side member 42 is a gear 50, while a worm wheel 51 is fixed (in. the eittension of said shaft 47 which is adjacent the intermediate side member 41. 40

The shaft ffihas the end thereof adjacent the intermediate side member 42 extended and fixed on said extension is a gear 52 which meshes with the gear on theshaft latter are pro ided with rack teeth which 47. a By this construction it will be apparent that upon rotation of the shaft 47 a corresponding rotation will be transmitted to the shaft is.

,Mounted in the free endof the ladder frame is a trans ersely disposedframe 53 in which is journaled pair of'parallel spaced shafts 54: and 55 each of which is provided with enlarged portions odjust in ward each end of the frame ,Movably mounted between the shafts 46 and t7 and the shafts and 55 is an extension ladder,

corresponding faces of the sides of which mesh with respective pinions 48 on the shaft 47. By this construction it will be appar ent that upon the rotation of the shaft 47 in one direction the extension ladder will be moved outwardly of the ladder frame while the reverseiotation of said shaft will move.

the extensioh ladderinwardly of said frame It will also be apparent that during such movements of the extension ladder it will be properly guided betiveen'." the shafts mounted in the frames 45 "and 53.

Mounted upon the corner member 38 adja'er'it its lnner'end is "a motor-=59 which receives its current from either the dynamo 14 or stoiag'ebattery 17. Journaled in suitable brackets upon the corner member is a shaft- (30 which is keyed to the sh'aftof the motor 59. Fixed on this shaft 60 is a worm 61 which operatively engages the worm wheel 51 on the shaftAfZ,qByreasonof the connections just described it, will be apparent that the operation .of t-hermotorg59 will effect the. rotation of the -shaft 47..so as tomove the extension ladder out of or into the ladder frame. i

The rear truck 11 is guided mechanism 62 which is controlled from a seat 63 mounted upon the cornermembers steering" 38 and 39. The ladder frame. is locked,

against descentunder the influence ofgravity by an automatic pawl 64: mountedupon the frame 24 and engaging the gear wheel 27. In order to elevatethe, ladder frame the necessary current is supplied toi-tlie motor 28 so as toefi'cct the rotation ofthe shaft 25. This rotation ofthe shaft 254 will-operrotate theshaft :32 and .lift the-free end 'of vation of the free end of the ladder frame is had the current is cut oiffrom the motor .28 and turnedinto the motoiyfitl [so ,as to effect the raising of EXtBnSlQIhlhddGl described In ascending theapparatus'after the ladder frame has been elevated and-the extension ladder 'raisedthe braces 43 are utilized until the seat 63 is reached, the back ate the segmental racks 33Y and 3 f-so as to the ladder frame. When the desired elecarried by the frame in a manner previously of the latter constituting a platform fromv which access to theextension ladderisreadily had to complete the ascent. ;To effect the lowering of theladder frame the extension ladder is drawn inwardly thereof in the manner previously described..anda,-the

pawl 64; disengaged from thegear, 23'. The

motor 28 is then operatedvso as to rotate the shaft 25 in a direction that will result in the movement of the free. end ofv theladder frame downward. During this downward movement .of the ladder frame the current may be cut out of the motor, ,59 and the weight of the -frame itself utilized in effecting the remainder of its dcscent,, the shock absorber 3O cushioning the ,pawlthereof at the termination of its movement.

lVhat is claimed is: .J In an apparatus-of the class described, the combination withfla pii/oted frame and mcansfor swinging same, a motor mounted on saidjframe, a ladder-slidably mounted'in said frame having corresponding faces of Aver-z its side members provided with rack teeth, the latter will rotate the former and effect a pair of spaced ear connected shafts-jourthe sliding of the ladder. naled transverse y of the frame between In testimony whereof, we afiix our signawhich said ladder moves, pinions fixed on tures, in presence of two witnesses.

' 5 one of said shafts operatively en a 'ing the teeth on the sides of said ladder re spzctively, CHARLES GARY rollers fixed on the other shaft bearing JAMES MARSHALL" against the non-toothed side of the ladder Witnesses: and connections between the first named JAMES BASHELL,

10 shaft and motor whereby the actuation of J. T. SMITH. 

